There are also a range of apps which are available on iDevices and Android, (including Soundcloud and Audioboo), that can be used to record audio via appcrawlr or for iOS on iAppGuide and also to edit audio via appcrawlr or for iOS on iAppGuide.
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There are also a range of hybrid options which use a mix of online, offline and apps such as Twisted Wave which is available as a download, as an app or online.

AudioBoom is a interesting service which not only offers the capability to record but you can also access a range of recordings. AudioBoom also offers free iPad, iPhone, and Android apps. AudioBoom's education section is full of great examples of using the service in classrooms.